I answered this once so this is I'm my opinion
Hoped it helped you
Simplify...
2.5(10−8)(9(10−10))
= 0
0 will be your answer...
Http://www.google.com/url?q=http://www.wikihow.com/Change-Margins-in-Word&sa=U&ved=0ahUKEwjpuuuJvsnRAhVF4iYKHX-8C74QFggRMAM&sig2=-XbyWk-K20lqedvdyZAPRA&usg=AFQjCNFq2c5yZ5-KFom4eWf-yWDk_O0vzw
The awnser is : 2/3 ( two thirds )
Hope it helps